Preservation of metal and metallic articles



UNITED STATES PATENT OFFICE.

NIELS CHRISTIAN FUNDER JENSEN; 0F SOUTHALL, ENG-LAND.

PRESERVATION OF METAL AND METALLIC ARTICLES.

No Drawing.

To all whom it my camera:

Be it known that I, Ninns CHRISTIAN FUNDVERKJE'NSEN, a subject of the King of Great Britain, residin at Southall, in the county of Middlesex, ngland, have invented new and useful Im rovements Relating tothe Preservation of etals and Metallic Articles, of which the following is a specification.

This invention relates to the treatment of metals and metallic articles for preserving them from oxidation or rustingand other influences and has reference to the kind of treatment in which the metal is furnished with a protective adherent film as the result of the application of oil and a high temperature.

According to this invention the metals,

' metallic-articles or the like are dipped or immersed in a bath of ordinary or common lubricating oil having a proportion of paraffin mixed therewith to render the same of a suitable consistency so as to be sufficiently 'fluid thin or mobile and then drained to draw ofi' superfluous oil deposit. The drained metals or articles are then subjected to heatin an appropriate chamber or oven whereof the temperature is raised to about 300 C. When the surface of the metals or articles assume approximately a grayish color or mat appearance and the moist or wet condition incidental to the oil bath has been removed therefrom the said metals or articles are taken from the heating chamberor-oven and dipped-or immersed without prevlous cooling in an oily mlxture consisting for example of whale oil and a mineral w oil such as ordinary commonlubricating oil. Having been allowed to remain for a T 40 suitable period of time in the last-mentioned oil mixture the metals or-articles are removed and drained whereupon the surfaces V f the metals or articles the bathof lubricating oil has been formed to give good results with are cleaned'by means of sawdustpr equiva-" lent material i g .In connection with the first immersion of a a 5% admixture of parafiin the said common lubricating oil being thereby rendered i f'ofsuitable consistency or fluidity =and sufficiently-Ithin or' mobile for the purpose of .the invention, and as regards the second im'- mersion the oily mixture may consist of equal parts of the whale oil and mineral or common lubricating oil. A

In working the'process the heating cham Specification of Letters Patent.

Patented Oct. 5, 1920.

Application in April as, 1919; Serial No. 292,083.

ber or oven may conveniently be provided with a suitable flue for allowing of the.

escape of any volatile fluids or fumes result- 1ng from the heating and in order to properly observe the progress of'the action on them to the aforesaid preservation treatment.

As the result of the treatment according to this invention the surfaces of the metals or articles are coated with a film of adherent preservative which effectually protects the said'metals or articles from the oxidizing influences of the atmosphere. It has also been found that the said adherent film acts as an insulator when employing metals or articles so treated in connection with electrical contrivances.

What I claim and desire to secure by Letters Patent of the United States is:-

1; The herein described treatment of metals and metallic articles for preserving the same from oxidation or rustingand otherinfluences consisting in dipping or immers ing the said metals or articles in a bath containing ordinary lubricating oil, draining the superfluous oildeposit therefrom, then subjecting the metals or articles to a temperature of about 300 C. until they assumea grayish tint or ash color, then and without previous cooling again dipping or immersing thein in an oily mixture removing and draining them and finally subjecting tliem to a cleansing action.

2. The herein described treatment of metals and metallic articles for preserving the same from oxidation or rusting and other influences consisting in dipping or immersing the said metals or articles in a bath'of ordinary or common lubricatin oil having a proportionof paraffin mixed therewith,

draining ofi the superfluous oil deposit, then Y subjecting the oiled and drained metals or articles to a temperature of about 300 C.

. inan apprpriatebhamber. or oven until the surface of the metals or articles presents a grayish coloror mat appearance and the moist condition is removed, then dipping or immersing the metals orarticles without previous cooling in an oily mixture composed of whale oil and mineral or ordinary common lubricating oil, removing the metals or articles, draining same and finallycleaning the surfaces thereof.

3. The herein described treatment of metals and metallic articles for preserving the same from oxidation or. rusting and other influences, consisting in dipping or immersing thej-said'metals or articles m a bath of ordinary or common lubricating oil with a 5%,a'dmixture of paraflin, draining off the superfluous oil deposit, then subjecting the oiled and drained metals or articles to a temperature of about 300 C. in an appropriate chamber or oven until the surface of the metals or articles presents a grayish color or-mat appearance and the moist condition is removed,'then* dipping or immersing the metals or articles without previous cooling I in an-oily mixturepomposed of whale oil and mineral or ordinary common lubricating oil, removing the metals or articles, draining same, andfinally cleaning the surfaces thereof.

4. The herein described treatment of metals and metallic articles for preserving the .same from oxidation or rusting and other priate chamber or oven until the surface of the metals or articles presents a grayish color or mat appearance and the moist condition is removed, then'dipping or immersing the metal or metals without previous cooling in an oily mixture consisting of equal parts of whale oil and mineral or ordinary lubricating oil, removing-the metals or articles, draining same, and finally cleaning the surfaces thereof.

NIELS CHRISTIAN FUNDER JENSEN. 

